Process for the preparation of 21-hydroxy steroids with...

Details Process for the preparation of 21-hydroxy steroids with... Process for the preparation of 21-hydroxy steroids with...

2011-01-11

2011-01-11

Badio, Barbara P (Department: 1628)

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

Reexamination Certificate

active

07868194

ABSTRACT:
A process is described for preparing, exclusively by chemical way, 21-hydroxy steroids having progestinic activity, said process having a high stereochemical control at C-21 position.

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PCT Written Opinion for PCT/EP2005/055410. “Chemistry of Oxaziridines, Asymmetric Oxidation of Ketone Enolates Using Enantiomerically Pure (Camphorsulfonyl) Oxaziridine,” Franklin Davis et al., J.Am Chem. Society, 1990, 112, pp. 6679-6690.
“Cerium(III) Chloride, a Novel Reagent for Nonaqueous Selective Conversion of Dioxolanes to Carbonyl Compounds,” Marcantini et al., J. Org. Chem., 1997, 62, pp. 4183-4184.

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